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Phoenix POSTreat Fluoride Removal Cartridge

Phoenix POSTreat Fluoride Removal Cartridge

4.8 (2,847 reviews)

The Phoenix POSTreat Fluoride Removal Cartridge uses proprietary FluoRid media to remove more than 95% of fluoride and arsenic from your drinking water, while retaining the essential nutrients your body needs. Compatible with all Phoenix Gravity Systems, it is designed to work in tandem with the Phoenix KokoCarb Cartridge as part of a complete multi-stage filtration setup. Please note this cartridge is not a standalone filter and must be used alongside a primary KokoCarb Cartridge for full performance. 

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  • NSF 372 ANSI 42 Certified
  • Fast & Free Shipping
  • Customer Support
  • 10 Year Warranty
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  • Retains 100% Nutrients
  • Fewer Refills Lower Cost
  • Expert Assistance 24/7
  • Easy Installation Setup
  • 10-Year Warranty
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Product Specifications

Detailed information to help you understand performance, materials, and capacity.

Description

The Phoenix POSTreat Fluoride Removal Cartridge uses proprietary FluoRid media to remove more than 95% of fluoride and arsenic from your drinking water, while retaining the essential nutrients your body needs. Compatible with all Phoenix Gravity Systems, it is designed to work in tandem with the Phoenix KokoCarb Cartridge as part of a complete multi-stage filtration setup. Please note this cartridge is not a standalone filter and must be used alongside a primary KokoCarb Cartridge for full performance. 

Key Features

  • The Phoenix gravity system is a powerful and easy-to-set-up worktop filtration solution that requires no plumbing or electricity.
  • Crafted from high-grade AISI 304 stainless steel, the housing is naturally BPA-free and non-leaching.
  • Inside, premium silver-infused activated carbon filters made from CTC 60 coconut shells eliminate 99.9% of contaminants while preserving the essential minerals.
  • With a filtration capacity 20X better than a typical jug filters and GAC, Phoenix delivers cleaner, healthier water using the natural force of gravity offering a sustainable, long-lasting alternative built with eco-friendly materials.
  • Phoenix Gravity Smart Carbon Cartridges are precisely engineered for compatibility with almost all gravity-fed water systems, delivering consistent performance and clean, safe water you can rely on.

Lab Reports

What’s in the box?

  • 2 x POSTtreat Fluoride Filters containing proprietary FluoRid media

Warranty

We stand behind our engineering with a comprehensive 10-year warranty covering all stainless steel components against manufacturing defects. if the system does not meet your performance expectations, we provide a full refund of the purchase price.

Shipping & Returns

  • Shipping: Dispatched within 24 hours. Tracked 1-3 day delivery across the UK.
  • Returns: We accept returns within 30 days of delivery in original, unused condition.
  • Packaging: Shipped in 100% recyclable, plastic-free protective materials to align with our commitment to environmental sustainability.

What Phoenix Gravity Water Filters remove?

Heavy Metals

Heavy Metals

99.99%

PFAs

PFAs

99.99%

Microplastics

Microplastics

99.99%

Feature

Feature

99.99%

Bacteria

Bacteria

99.99%

Pesticides

Pesticides

99.99%

How Does PHOENIX Compare?

See why gravity filtration is the superior choice

Feature
Plumbed in system
Bottled Water
Jugs
Affordable
Portable
Durable 304 Stainless Steel
Easy to Maintain
Large Capacity
No Plumbing Required

Frequently Asked Questions

Everything you need to know about your Filtrix Water Filter system

Which size filter is best for me?

This depends on how many people will be using your Phoenix Gravity Water Filter, and how much water you drink! Generally, we recommend:

6-Litre - Perfect pairing, for up to 1-2 people

8-Litre - In the middle, for up to 2-4 people

12-Litre - Family friendly, for 3-4 + people

Can I clean my filter?

Gravity Filter:We recommend hand washing using warm soapy water and a non-abrasive cloth or sponge. Then, leave to air dry or buff with a microfiber cloth. (Don’t forget to remove your cartridges first!)

Cartridges:Wash these under cold running water only and using a mildly abrasive scourer or brush, gently massage along cartridges from mount to end only - to avoid contamination.

POSTreat:Again, use warm soapy water and a non-abrasive cloth/ sponge. Then, leave to air dry or buff with a microfiber cloth. (Don’t forget to remove the media first!)

Can I set it up myself?

Certainly! Our systems are designed to be extremely easy to assemble and everything you need will be included. You can do it yourself with just your hands - there’s no specialist tools, plumbers or electricians required.We include full instructions with every unit and we’re always here to help.

How does the Phoenix Gravity Filter compare to plastic jugs or other filters?

The Phoenix Gravity is one of the most advanced filtration systems on the market. With a Phoenix Gravity System, your water is purified through two-stages of activated carbon filtration to remove 99.9% of contaminants including bacteria, parasites, cysts, pesticides, heavy metals and more.  This means we can trap physical contaminants that are more than 20 times smaller than jug filters. Combined with our higher filtration contact time we are 20 times more powerful than typical jug filters and those using granular carbon.

Our stainless steel chambers not only prevent microplastics and other harmful chemicals from leaching into your water, but also hold significantly more purified water than the average jug. This makes it even easier for you to enjoy fresh, nutrient-rich hydration - whenever you need it most. Unlike Reverse Osmosis (RO) filters, the gravity system does not require electricity to run or a plumber to install - and it won’t strip your water of the healthy nutrients your body benefits from.

Are Phoenix Gravity Smart Carbon Cartridges compatible with my gravity-fed system?

Yes! Phoenix Gravity Smart Carbon Cartridges are precision-engineered to work with nearly all gravity-fed water systems. They’re built for reliable performance and deliver clean, safe, great-tasting water every time.

Start Drinking Cleaner Water Today

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